siemens



(No Model.) 3 SheetsSheet 1,

F. SIEMENS. REGBNERATIVEGAS FURNAGE AND PRODUCER.

No. 468,834. Patented Feb. 16, 1892.

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(No Model.) 3 Sheets-Shet 2.

' F. SIEMENS. V REGENERATIVE GAS FURNACE AND PRODUCER. No. 468,834.

Patented Feb. 16, 1892.

I I I lav/4i??? n W a III II/I/I/////IIIIIIIIII (No Model.) 3 Sheets-Sheet 3.

F. SIEMENS. REGENERATIVB GAS FURNACE AND PRODUCER.

No. 468,884. Patented Feb. 16,1892.

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UNITED STATES PATENT OFFICE.

FREDERICK SIEMENS, OF DRESDEN, GERMANY.

REGENERATIVE GAS FURNACE AND PRODUCER.

SPECIFICATION forming part of Letters Patent No. 468,834, dated February 16, 1892. Application filed January 26, 1891. Serial No. 379,095. (No model.) Patented in England December 13, 1889, No. 20,033.

To all whom it may concern:

Be it known that I, FREDERICK SIEMENS, of Dresden, in the Empire of Germany, have in vented an Improvement in Regenerative Gas Furnaces and Producers, of which the following is a specification, and for which I have obtained a patent in Great Britain, dated December 13, 1889, and numbered 20,083.

My invention relates to regenerative gasfurnaces of the type in which the gas-producer is located close to the furnace-chamber and in which the incombustible products of combustion are transmitted, one portion through an air-regenerator to heat the air used in combustion and the other portion through the fuel in the gas-producer to aid in heating the fuel, and whereby the incombustible gases transmitted to the producer are again rendered combustible by taking up a portion of carbon from the hot fuel in the producer.

My present invention relates more especially to the means employed for supplying a gasproducer so located with highly-heated air so as to render the producer more effective for the production of gas and the reduction of the incombustible products of combustion which are conveyed to it.

My invention also relates to the means employed of supplying a gas-producer so located with highly-heated air and a portion of the products of combustion from a furnace-chamber at one and the same time, the heated air and the products of combustion delivered independently of each other or in a mixed condition into the producer.

My invention relates, also, to means of supplying a gassproducer and air-regenerator with air under pressure.

In the accompanying drawings, which illustrate my invention, similar letters and figures of reference indicate like parts.

Figure 1 is a longitudinal section on the line y y of Fig. 2. Fig. 2 is a sectional plan on the line 00 a: of Fig. 1, showing one form of furnace and producer arranged according to my invention. Fig. 3 is a vertical section corresponding to Fig. 1, with its heating-chambeer so modified as to permit ingots to be in troduced into it vertically through its top. Fig. 4 is a central longitudinal section of a furnace provided with a continuous regenerof air and gas ports and having alternating airregenerators arranged below it. Fig. 7 is a sectional plan on the line b b of Fig. 8. Fig. 8 is a longitudinal section on the line a a of Fig. 7, showing a furnace-chamber with a producer at each end and dues and ports so arranged that the furnace-chamber is heated by a flame sweeping around in horseshoe form at each end.

In the drawings, A is the combustion-chamber; B, one of the regenerative chambers, of which there are two, which may be alternated in the usual way by means of the reversing-valve IV, which is of the ordinary construction used with regenerative gas-furnace.

The regenerators employed may be of the usual reversible type, as shownin Figs. 11 and 3, and serve to heat the air supplied to the furnace and that to the gas-producer, or the regenerators may be of the continuous type, as shown in Fig. 4.. The regenerators may be arranged at both sides or below the gas-producer, or in other convenient location and proximity to the furnace, so that the gases delivered therefrom may not be cooled in transit and loss of heat may be avoided by exposed wall-surfaces.

O is the gas-producer, which is shown as a single chamber, and which communicates on opposite sides thereof with the combustionchamber A by either of the two passages II and gas-ports D, as determined by the opening of either one or the other of the two valves V.

The hot air which flows from the regenerator B by means of the port G is divided into two portions after leaving the regenerator. One portion is transmitted by the flue and passage F to the furnace-port E, where it meets the gas passing from the producer by the passage D, with which it is combined, producing a flame which sweeps around the combustion -chamber A in horseshoe form. The products of combustion make their exit by the opposite port E, passing from thence a portion to heat the opposite regeneratorst eam-j et.

chamber, and from thence to the chimneystack, and a portion impelled by means of the steam-jet or blast-pipe K and caused to pass through the hot fuel in the producer. The other portion of hot air from the regenerator is caused by means of the steam -jet or blast-pipe K to pass through the mass of fuel in the producer.

By regulating the action of the steam-jets or blast-pipes K and K any desired portion of the hot air or the incombustible products of combustion from the combustion-chamber can be supplied to the producer 0.

lVhen it is desired to operate the producer without employing the heated air or the portion of the products of combustion usually diverted under the grate L of the producer, the passages under the hearth of the producer may be closed by means of the valves U.

In addition to the incombustible products of combustion delivered under the hearth and the portion of heated air from the regenerator a portion of air at the ordinary temperature may be introduced under the hearth by means of the steam-jet or blastpipe J.

I have spoken of steam-jets and blastpipes. It is immaterial whether a steam-jet be employed or a pipe for forcing air. The same result will practically be accomplished in either case, although I prefer to use a The jet or pipe J may be used independently of the jet K, if desired.

In the furnace shown in Fig. 3 the chamber A has the combustion-chamber arranged for heating ingots I, the roof of the furnace A being provided with openings and covers A through which the ingots I to be heated may be introduced vertically. In this case, instead of employing a steam-jet or blast-pipe K to direct the hot air through the producer 0, the air may be supplied to the furnace under pressure, being conveyed by the pipe M from a blower or pump 10 to the reversingvalve WV. Thence it passes to either one or the other of the regenerative chambers B and B. Thence the air passes partially by the flue F to the combustion-chamberA and partially to the gas-producer O, the quantity being regulated by a suitable damper in flue F or a valve V.

In Fig. 4 I have shown a combustion-chamber combined with a producer and with a regenerator of the continuous kind, which consists of a number of zigzag flues N, through which the hot products of combustion pass from the combustion-chamber A, with corresponding flues N between and alternating with them, through which air passes in the opposite direction to the combustion-chamber or to the gas-producer C, or partially to each. This form of combustion-chamber with continuous regenerator may also be supplied with the products of combustion and heated air, as is the case with the furnaces shown in Figs. 1 and 3.

In Figs. 4 and 5 I have shown an arrangement of gas and air portsfor supplying combustible gases and discharging the products of combustion from the combustion-chamber A. P and P are air-ports, and Band B corresponding gas-ports. O is the exit-port. The flames from the ports P R and P R sweep around the furnace in horseshoe form and leave the furnace by means of the port 0.

In Fig. 6 I have shown an arrangement of the gas and air ports for a producer provided with a pair of air-regenerators acting alternately. S is a port, which is arranged to always deliver gas from the producer 0, and on each side of which are the ports T T. One of these portsas, for instance, T-acts at the time as an air-delivery port from one of the two regenerators B B, while by the opposite port T the products of combustion are conveyed away from the combustion-chamber. This action may be alternated in the usual manner by means of the reversing-valve IV and valve V.

The furnace shown in Figs. 7 and S is provided with a long combustion-chamber and a producer and pair of regenerators at each end of the chamber. It is virtually two such furnaces as are shown in Fig.1, with the combustion-chamber of the two furnaces thrown into one, and may be operated in the same manner as the furnace shown in Figs. 1 or 3- that is to say, the producer may be worked simply as a producer and in the usual manner, or a portion of the products of combustion at each side of the furnace may be diverted through the respective producers, or the respective producers may have transmitted to them a portion of the products of combustion and a portion of the air heated in the respective regenerator chambers, and such products of combustion and air may have delivered under the grate a portion of the products of combustion, a portion of the regenerated-air, and cooled air.

It is not necessary to enter into a detailed description of the different ways of operating the producers in a furnace of the character shown in Figs. 7 and 8,as their management will be readily understood by reason of the foregoing description applied to Fig. 1.

In the drawings I have shown a producer supplied with heated air from one or from one of two regenerators arranged in proximity .to the producer. It will be obvious that the producer may be supplied with heated air obtained from any suitable sourceas, for instance, from an air-heating device or from a regenerator located independently of the producer which it supplies. I

I have generally described my invention as applicable to heating-furnaces; but I wish it understood that it may be employed in melt-= ing and puddling iron, melting glass or steel in crucibles, or in tanks, muffles, and other furnaces, particularly those requiring intense heat.

IIO

Many changes may obviously be made in the construction of the furnace without departing from the intent of my invention.

Having thus described my invention, I claim- 1. The combination, in a regenerative gasfurnace, of a combustion-chamber, a gas-prod ucer, reversible air heating regenerators, fines which connect each side of the gas-producer at its top with the combustion-chamber, valves in said fines, fines which connect the regenerators with the combustion-chamber at opposite sides thereof, and fines which connect the combustion-chamber and the regenerators with the gas-producer at each side of its bottom portion, substantially as described.

2. Thecombination, in a regenerative gasfurnace, of a combustion-chamber, a gas-producer, reversible air heating regenerators, fines which connect each side of the gas-produceratits top with the combustion-chamber, valves in said fines, fines which connect the regenerators with the combustion-chamber at opposite sides thereof, fines which connect the combustion-chamber and the regenerators with the gas-producer at each side of its bottom portion, and a blast-pipe in each of said fiues near to the producer end thereof, substantially as described.

3. The combination, in aregenerative gasfurnace, of a combustion-chamber, a gas-producer, reversible airheating regenerators, fines which connect each side of the gas-prod ucer at its top with the combustion-chamber, valves in said fines, fines which connect the regenerators with the combustion-chamber at opposite sides thereof, fines which connect the combustion chamber and the regenerators with the gas-producer at each side of its bottom portion, a blast-pipe in each of said fines near to the producer end thereof, and ablastpipe arranged under the hearth or grate of the producer, substantially as described.

4:. The combination, in a regenerative gasf nrnace, of a combustion-chamber, a gas-producer, reversible air-heating regenerators, fines which connect each side of the gas-producer at its top with the combustion-chamber, valves in said fines, fines which connect the regenerators with the combustion-chamber at opposite sides thereof, fines which connect the combustion chamber and the regenerators with the gas-producer at each side of its bottom portion, a valve in each of said fines near to the producer end thereof, and a blast-pipe arranged under the hearth or grate of the producer, substantially as described.

5. The combination, in a regenerative gasfurnace, of a combustion-chamber, a gas-pro ducer, reversible air-heating regenerators, an air-supply duct provided with a reversingvalve, a pump connected to said duct, flues which connect each side of the gas-producer at its top to the combustion-chamber, Valves in said fines, fines which connect the regenerator with the combustion-chamber at opposite sides thereof, flnes which connect the combustion chamber and air regenerators with the gas-producer at each side of its bottom portion, and a valve in each of said fiues near to the producer end thereof, substantially as described.

6. In combination with a regenerative gasfurnace having regenerators for heating air only,a gas-producer near to the furnace-chamber, and means for supplying said producer under its hearth or grate a portion of heated air from the regenerators and a portion of the waste products of combustion from the furnace, substantially as described.

7. In combination with a regenerative gasfnrnace having regenerators for heating air only, a gas-prod ucer near to the furnace-chamher, and means for supplying to said producer under its hearth or grate a portion of heated air from the regenerators, a portion of the waste products of combustion from the furnace, and a portion of cold air in any desired proportions, substantially as described.

8. The combination, in a regenerative gasf nrnace, of a gas-producer, reversible air-heating regenerators, fines which connect the regenerators with the combustion-chamber at opposite sides thereof, fines leading from the regenerators to each side of the bottom of the gas-producer, and a blast-pipe in each of said fines near to the producer end thereof, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERICK SIEMENS.

Witnesses:

0. MAX HERRMANN, CARL HERMANN SCHROTTEN,

Both of Dresden, Saxony.

ISO 

